| 认知无线电网络中具有中断概率约束的波束成形 |
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| 引用本文： | 谢显中,杨璐璐,唐亮军.认知无线电网络中具有中断概率约束的波束成形[J].北京邮电大学学报,2011,34(Z1):5-8. |
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| 作者姓名： | 谢显中 杨璐璐 唐亮军 |
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| 作者单位： | 重庆邮电大学宽带接入网络研究所/计算机网络与通信信息产业部重点实验室; |
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| 基金项目： | 国家自然科学基金项目(60872037); 重庆市自然科学基金项目(2008BB2411); 重庆市教委应用基础研究基金项目(KJ080508) |
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| 摘 要： | 研究了在认知无线电（CR）网络中发送端波束成形的算法设计. 为了保证服务质量，建立了以CR用户的中断概率和主用户的中断概率为约束条件，最小化CR网络发送端功率的数学优化问题. 仿真结果表明，在发送端已知信道协方差误差分布的情况下，所提算法可有效控制各CR用户的发射功率，提高CR网络性能和降低对授权用户的干扰.
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| 关 键 词： | 认知无线电 波束成形 中断概率 信道不确定 |
Beamforming for Cognitive Radio Networks under Outage Probability Constraints |
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| XIE Xian-zhong,YANG Lu-lu,TANG Liang-jun.Beamforming for Cognitive Radio Networks under Outage Probability Constraints[J].Journal of Beijing University of Posts and Telecommunications,2011,34(Z1):5-8. |
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| Authors: | XIE Xian-zhong YANG Lu-lu TANG Liang-jun |
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| Affiliation: | XIE Xian-zhong,YANG Lu-lu,TANG Liang-jun(Institute of Broadband Access Network/MII Key Laboratory on Computer Network and Communication,Chongqing University of Posts and Telecommunications,Chongqing 400065,China) |
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| Abstract: | The transmit beamforming algorithm design of cognitive radio(CR) network is studied.In order to guarantee the quality of service,the optimization is formulated to minimize the CR network transmit power under the constraint of outage probability at the CR users and primary users.Simulations show that with the knowledge of assumed statistical distribution of channel covariance error at the transmitter,this scheme can effectively minimize the transmit power of each CR user,enhance the CR network performance an... |
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| Keywords: | cognitive radio beamforming outage probability channel uncertainties |
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